FIELD OF THE INVENTION
[0001] The present invention relates to the field of communication technologies, and in
particular, to a voltage driving apparatus for a power amplifier, Power Amplifier,
abbreviated as PA, a power amplifying system, a power supply device, and a DC/DC power
converter.
BACKGROUND OF THE INVENTION
[0002] A radio frequency power amplifier is an important component of a transmitting device.
Its main technical indicators include output power and efficiency. Based on the prior
art and the core principle of the radio frequency power amplifier, the efficiency
of the radio frequency power amplifier is low. The radio frequency power amplifier
in the prior art usually adopts a multi-stage gain mode. A bias voltage Vcc1 supplies
power to the internal logical circuit and bias circuit. A bias voltage Vcc2 supplies
power to the internal radio frequency power amplifier. A communication device normally
does not need to transmit signals at the maximum power. In order to increase the efficiency
on occasions except when the radio frequency power amplifier uses the maximum power
to transmit signals, the bias voltage generally adopts a fixed voltage supply and
adopts different gain modes according to different power output requirements, for
example, a Vmode0 gain mode and a Vmode1 gain mode.
[0003] During the implementation of the present invention, it is found that the prior art
has at least the following problem: If the communication device uses the non-maximum
power to transmit signals, the power loss of the radio frequency power amplifier is
large and the efficiency is low.
[0004] CN 1756099 discloses a mobile communication terminal with adjustable driving voltage of power
amplifier and control methods thereof.
CN 1938942 discloses a power amplifier unit, communication terminal and control method ot power
amplifier
US 2002/171481 A1 (SONY CORP) (2002-11-21) discloses a similar apparatus.
US6377825 discloses a hands-free wireless communication in a vehicle.
SUMMARY OF THE INVENTION
[0005] Embodiments of the present invention provide a voltage driving apparatus for a power
amplifier, a power amplifying system, a power supply device, and a communication device,
to reduce the power loss of the power amplifier and increase the efficiency of the
power amplifier.
[0006] An embodiment of the present invention provides a voltage driving apparatus for a
power amplifier, comprising a voltage input module configured, in use, to be electrically
connected to a supply voltage, and a voltage output module, wherein the voltage output
module is connected to the power amplifier to provide a supply voltage, wherein the
voltage driving apparatus further comprises: a signal input module, configured to
receive a variable input electric signal; and a control module, electrically connected
to the signal input module, the voltage input module, and the voltage output module,
and configured to store a table of corresponding information between supply voltages
for the power amplifier and variable input electric signals of input variable pulse
signals, and adjust an output voltage of the voltage output module dynamically according
to the variable input electric signal received by the signal input module and the
stored table; characterized in that the variable input electric signal received by
the signal input module is an input variable pulse signal and the control module is
further configured to dynamically adjust the output voltage of the voltage output
module according to a duty cycle of the pulse signal. An embodiment of the present
invention provides a power amplifying system, including a power amplifier and a voltage
driving apparatus, where the voltage driving apparatus includes a voltage input module
and a voltage output module, where the voltage output module is connected to the power
amplifier to provide a supply voltage; and the voltage driving apparatus further includes:
a signal input module, configured to receive a variable input electric signal; a control
module, electrically connected to the signal input module, the voltage input module,
and the voltage output module, and configured to dynamically adjust the output voltage
of the voltage output module according to the variable input electric signal received
by the signal input module.
[0007] In the embodiments of the present invention, the control module is used to adjust
the voltage of the power amplifier, to reduce the power loss of the power amplifier
and increase the efficiency of the power amplifier. This reduces the size and energy
consumption of a communication device, to save the cost of use, prolong the service
life of parts, and make a communication system less dependent on an environment.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] To describe the technical solutions in the embodiments of the present invention more
clearly, accompanying drawings required for describing the embodiments are briefly
introduced below. Apparently, the accompanying drawings in the following description
are merely about some embodiments of the present invention, and persons of ordinary
skill in the art may further obtain other drawings according to the accompanying drawings
without any creative effort.
FIG. 1 is a schematic structural diagram according to first and second embodiments
of the present invention;
FIG. 2 a schematic circuit diagram where a DC/DC chip is used as a voltage driving
apparatus according to the present invention;
FIG. 3 is a schematic structural diagram according to third and fourth embodiments
of the present invention;
FIG. 4 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier according to a fifth embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier according to a sixth embodiment of the present invention; and
FIG. 6 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier according to a seventh embodiment of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0009] It should be noted that, the described embodiments are only a part of the embodiments
of the present invention rather than all the embodiments. All other embodiments obtained
by persons of ordinary skill in the art based on the embodiments of the present invention
without creative effects shall fall within the protection scope of the present invention.
Embodiment 1
[0010] A first embodiment of the present invention provides a voltage driving apparatus
1 for a power amplifier. A structure of the apparatus is shown in FIG. 1, including
a voltage input module 11 and a voltage output module 12. The voltage input module
11 is electrically connected to a supply voltage to provide an input voltage to the
voltage driving apparatus. The voltage output module 12 is electrically connected
to a power amplifier, not shown in the figure, referring to FIG. 3, to provide an
input voltage to the power amplifier. The voltage driving apparatus 1 further includes:
a signal input module 13, configured to receive an input electric signal which is
a variable input electric signal; and
a control module 14, electrically connected to the signal input module 13, the voltage
input module 11, and the voltage output module 12, and configured to dynamically a
control module 14, electrically connected to the signal input module 13, the voltage
input module 11, and the voltage output module 12, and configured to dynamically adjust
the output voltage of the voltage output module 12 according to the variable input
electric signal received by the signal input module 13.
[0011] According to the voltage driving apparatus for the power amplifier provided in the
embodiment of the present invention, a signal input module is added in the voltage
driving apparatus for the power amplifier provided in the embodiment of the present
invention, so that the output voltage is adjusted dynamically according to the variable
input electric signal received by the signal input module. Compared with the fixed
output voltage in the prior art, with the present invention, a terminal can be more
energy-saving through dynamic adjustment of the output voltage and the heat generated
by the terminal can be reduced. The voltage driving apparatus for the power amplifier
may be used on a terminal, such as a data card, an external 3G antenna, a mobile terminal,
or a PDA.
Embodiment 2
[0012] A second embodiment of the present invention provides a voltage driving apparatus
for a power amplifier. A structure of the apparatus is shown in FIG. 1, including
a voltage input module 11 and a voltage output module 12. The voltage input module
11 is electrically connected to a power supply system (not shown in the figure) to
provide an input voltage to the voltage driving apparatus 1. The voltage output module
12 is electrically connected to the power amplifier (not shown in the figure, referring
to FIG. 3) to provide an input voltage to the power amplifier. The voltage driving
apparatus 1 further includes:
a signal input module 13, configured to receive an input electric signal which is
a variable input electric signal; and
a control module 14, electrically connected to the signal input module 13, the voltage
input module 11, and the voltage output module 12, and configured to dynamically adjust
the output voltage of the voltage output module 12 according to the variable input
electric signal received by the signal input module 13.
[0013] 12. An X pin acts as the signal input module 13 to receive a variable input electric
signal. The input electric signal may be a bias voltage or a pulse signal. When the
input signal is a bias voltage, the signal input module 13 may be a bias voltage receiving
module to receive an input bias voltage; the DC/DC chip determines the output voltage
of the voltage output module 12 according to the voltage value of the bias voltage.
When the input electric signal is a pulse signal, the signal input module 13 may be
a pulse duty cycle modulating and receiving module to receive an input pulse signal;
the DC/DC chip determines the output voltage of the voltage output module 12 according
to the duty cycle of the pulse signal. The control module 14 may be an internal circuit,
not shown in the figure, of the DC/DC chip. The internal circuit needs to detect the
input electric signal. There are multiple means in the prior art to achieve this purpose,
for example, by adopting a comparison circuit or a detection circuit, and the embodiment
of the present invention is not limited thereto. The internal circuit is capable of
identifying the bias voltage or the input pulse signal and dynamically adjusting the
output voltage value of LX1 and LX2 according to the identified change of the voltage
or the duty cycle of the input pulse signal, to implement real-time dynamic adjustment
of the supply voltage of the PA.
[0014] In examples outside the scope of the invention, the dynamic adjustment may be implemented
according to the input voltage. In an example of the present invention, the dynamic
adjustment is implemented according to the pulse signal.
[0015] In examples outside the scope of the invention where the dynamic adjustment may be
implemented according to the input voltage, after the bias voltage VBIAS is input
into the DC/DC chip, the output voltage is determined according to Table 1 of the
internal circuit. In this way, numerous voltage values may be obtained theoretically,
which means that the smooth switching of the supply voltage of the PA can be achieved.
Table 1
VBIAS=V1 |
VBIAS= V2 |
VBIAS= V3 |
...... |
VBIAS= Vx |
V1x |
V2x |
V3x |
|
Vxx |
[0016] In the present invention, after the pulse signal PWM is input into the DC/DC chip,
the output voltage is determined according to Table 2 of the internal circuit. In
this way, numerous voltage values may be obtained theoretically, which means that
the smooth switching of the supply voltage of the PA can be achieved.
Table 2
Duty=1 % |
Duty=2% |
Duty=3% |
...... |
Duty =x% |
VI |
V2 |
V3 |
|
Vx |
[0017] A terminal or an external device may generate the input electric signal dynamically
according to the working voltage required by the power amplifier and send the input
electric signal to the voltage driving apparatus. The correspondence between the output
voltage and the input electric signal may be obtained through inverse induction according
to the foregoing Table 2. After the input electric signal is input to the DC/DC chip,
the internal circuit of the DC/DC chip obtains the corresponding output voltage according
to Table 2, so as to adjust the supply voltage of the PA dynamically according to
the variable input electric signal. As compared with the fixed output voltage in the
prior art, the energy consumption of a power amplifying system can be reduced and
the amount of generated heat can be reduced.
[0018] The implementation through a DC/DC chip is only one of implementation manners of
the present invention. The apparatus may also be implemented by adopting a new independent
voltage driving apparatus or may be implemented through another chip, which is not
limited by the present invention. The bias voltage and pulse signal each are only
one implementation implementation manner of the input electric signal of the embodiment
of the present invention, which is not limited by the embodiment of the present invention.
[0019] In the embodiment of the present invention, an existing DC/DC chip is improved by
inputting a variable input electric signal at one X pin of the DC/DC chip without
the need of changing the circuit structure of the voltage driving apparatus made up
of the existing DC/DC chip. In this way, the DC/DC chip can control the input voltage
according to the external input electric signal to save electrical power. An existing
terminal such as a data card or a 3G antenna, is inserted into a portable computer
for use, and an existing terminal, such as a mobile terminal or a PDA is already intelligent.
Therefore, an input electric signal can be sent from the outside to the voltage driving
apparatus of the terminal according to the voltage value required by the power amplifier
of the current terminal to dynamically control the output voltage of the voltage driving
apparatus.
[0020] The voltage driving apparatus for the power amplifier provided in the embodiment
of the present invention, a signal input module is added in the voltage driving apparatus
for the power amplifier provided in the embodiment of the present invention, so that
the output voltage is adjusted dynamically according to the variable input electric
signal received by the signal input module. Compared with the fixed output voltage
in the prior art, with the present invention, the terminal can be more energy-saving
through dynamic adjustment of the output voltage, and the heat generated by the terminal
can be reduced. The voltage driving apparatus for the power amplifier may be used
on a terminal, such as a data card, an external 3G antenna, a mobile terminal, or
a PDA.
Embodiment 3
[0021] A third embodiment of the present invention provides a power amplifying system. A
structure of the system is shown in FIG. 3, including a power amplifier 2 and a voltage
driving apparatus 1. The voltage driving apparatus 1 includes a voltage input module
11 and a voltage output module 12. The voltage input module 11 is electrically connected
to a power supply system (not shown in the figure) and configured to provide an input
voltage to the voltage driving apparatus 1. The voltage output module 12 is electrically
connected to the power amplifier 2 and configured to provide an input voltage to the
power amplifier 2. The voltage driving apparatus 1 further includes:
a signal input module 13, configured to receive an input electric signal which is
a variable input electric signal; and
a control module 14, electrically connected to the signal input module 13, the voltage
input module 11, and the voltage output module 12, and configured to dynamically adjust
the output voltage of the voltage output module 12 according to the variable input
electric signal received by the signal input module 13.
[0022] According to the power amplifying system provided in the embodiment of the present
invention, the output voltage is determined through dynamic adjustment of the received
input electric signal. Compared with the fixed output voltage in the prior art, with
the present invention, a terminal can be more energy-saving through dynamic adjustment
of the output voltage and the heat generated by the terminal can be reduced. The power
amplifying system may be used on a terminal, such as a data card, an external 3G antenna,
a mobile terminal, or a PDA.
Embodiment 4
[0023] A fourth embodiment of the present invention provides a power amplifying system.
A structure of the system is shown in FIG. 3, including a power amplifier 2 and a
voltage driving apparatus 1. The voltage driving apparatus 1 includes a voltage input
module 11 and a voltage output module 12. The voltage input module 11 is electrically
connected to a power supply system (not shown in the figure) and configured to provide
an input voltage to the voltage driving apparatus 1. The voltage output module 12
is electrically connected to the power amplifier (not shown in the figure) and configured
to provide an input voltage to the power amplifier. The voltage driving apparatus
1 further includes:
a signal input module 13, configured to receive an input electric signal which is
a variable input electric signal; and
a control module 14, electrically connected to the signal input module 13, the voltage
input module 11, and the voltage output module 12, and configured to dynamically adjust
the output voltage of the voltage output module 12 according to the variable input
electric signal received by the signal input module 13.
[0024] The voltage driving apparatus 1 may be a DC/DC chip. A specific circuit diagram is
shown in FIG. 2. The PVDD1, PVDD2, and VDD pins of the DC/DC chip act as the voltage
input module 11; the LX1 and LX2 pins of the DC/DC chip act as the voltage output
module 12. An X pin acts as the signal input module 13 to receive a variable input
electric signal. The input electric signal may be a bias voltage or pulse signal.
When the input signal is a bias voltage, the signal input module 13 may be a bias
voltage receiving module to receive an input bias voltage; the DC/DC chip determines
the output voltage of the voltage output module 12 according to the voltage value
of the bias voltage. When the input electric signal is a pulse signal, the signal
input module 13 may be a pulse duty cycle modulating and receiving module to receive
an input pulse signal; the DC/DC chip determines the output voltage of the voltage
output module according to the duty cycle of the pulse signal. The control module
14 may be an internal circuit of the DC/DC chip. The internal circuit needs to detect
the input electric signal. There are multiple means in the prior art to achieve this
purpose, for example, by adopting a comparison circuit or a detection circuit, and
the embodiment of the present invention is not limited thereto. The internal circuit
is capable of identifying the bias voltage or the input pulse signal and dynamically
adjusting the output voltage value of LX1 and LX2 according to the variably identified
change of the voltage or the duty cycle of the input pulse signal, to implement real-time
dynamic adjustment of the supply voltage of the PA.
[0025] A terminal or an external device may generate the input electric signal dynamically
according to the working voltage required by the power amplifier and send the input
electric signal to the voltage driving apparatus. The correspondence between the output
voltage and the input electric signal may be obtained through inverse induction according
to the foregoing Table 1 and Table 2. After the input electric signal is input to
the DC/DC chip, the internal circuit of the DC/DC chip obtains the corresponding output
voltage according to Table 1 and Table 2, so as to adjust the supply voltage of the
PA dynamically according to the variable input electric signal. As compared with the
fixed output voltage in the prior art, the energy consumption of a power amplifying
system can be reduced and the amount of generated heat can be reduced.
[0026] The implementation through a DC/DC chip is only one of implementation manners of
the present invention. The apparatus may also be implemented by adopting a new independent
voltage driving apparatus or may be implemented through another chip, which is not
limited by the present invention. The bias voltage and pulse signal each are only
one implementation manner of the input electric signal of the embodiment of the present
invention, which is not limited by the embodiment of the present invention.
[0027] In the embodiment of the present invention, an existing DC/DC chip is improved by
inputting a variable input electric signal at one X pin of the DC/DC chip without
the need of changing the circuit structure of the voltage driving apparatus made up
of the existing DC/DC chip. In this way, the DC/DC chip can control the input voltage
according to the external input electric signal to save electrical power. An existing
terminal, such as a data card or a 3G antenna, is inserted into a portable computer
for use; and an existing terminal, such as a mobile terminal or a PDA is already intelligent.
Therefore, an input electric signal can be sent from the outside to the voltage driving
apparatus of the terminal according to the voltage value required by the power amplifier
of the current terminal to dynamically control the output voltage of the voltage driving
apparatus.
[0028] According to the embodiment, in the power amplifying system provided in the embodiment
of the present invention, a signal input module is added in the voltage driving apparatus
for the power amplifier provided in the embodiment of the present invention, so that
the output voltage is adjusted dynamically according to the variable input electric
signal received by the signal input module. Compared with the fixed output voltage
in the prior art, with the present invention, a terminal can be more energy-saving
through dynamic adjustment of the output voltage, and the heat generated by the terminal
can be reduced. The power amplifying system may be used on a terminal, such as a data
card, an external 3G antenna, a mobile terminal, or a PDA. According to the present
invention, the means of implementation through an existing DC/DC chip is also provided,
and the existing DC/DC chip is improved to receive the input electric signal and determine
the output voltage dynamically according to the input electric signal. An existing
terminal, such as a data card or a 3G antenna, is inserted into a portable computer
for use; and an existing terminal, such as a mobile terminal or a PDA, is already
intelligent. Therefore, an input electric signal can be sent from the outside to the
voltage driving apparatus of the terminal according to the voltage value required
by the power amplifier of the current terminal, so as to dynamically control the output
voltage of the voltage driving apparatus.
Embodiment 5
[0029] FIG. 4 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier provided in a fifth embodiment of the present invention. As shown
in FIG. 5, the power supply device for the radio frequency power amplifier in the
embodiment includes a parameter detection module 21, a control module 22, and a power
supply module 23. The parameter detection module 21 is disposed on a radio frequency
transmit channel of the radio frequency power amplifier and configured to detect a
system parameter, such as power, a current, on the radio frequency transmit channel;
the control module 22 is connected to the parameter detection module 21 and configured
to determine a voltage parameter according to the system parameter detected by the
parameter detection module 21; the power supply module 23 is connected to the control
module 22 and configured to provide a voltage corresponding to the voltage parameter
determined by the control module 22 to the radio frequency power amplifier.
[0030] In the embodiment, the parameter detection module 21 may be disposed in any position
on the radio frequency transmit channel. Specifically, the parameter detection module
21 may be disposed at the output end (PA Output) of the radio frequency power amplifier
to detect the output system parameter of the radio frequency power amplifier; or may
be disposed at the input end (PA Input) of the radio frequency power amplifier to
detect the input system parameter of the radio frequency power amplifier. For example:
[0031] If the parameter detection module 21 is disposed at the output end of the radio frequency
power amplifier, the parameter detection module 21 may detect the transmit power of
the radio frequency power amplifier. The control module 22 may be used to adjust the
output voltage of the power supply module 23 according to the transmit power detected
by the parameter detection module 21. Different bias voltages are used to supply power
to the radio frequency power amplifier when the transmit power of the radio frequency
power amplifier is different. For example, when the transmit power detected by the
parameter detection module 21 is 24 dB, the output voltage of the power supply module
23 may be 3.3 V; when the transmit power detected by the parameter detection module
21 is 20 dB, the output voltage of the power supply module 23 may be 3.0 V; when the
transmit power detected by the parameter detection module 21 is 18 dB, the output
voltage of the power supply module 23 may be 2.8 V. Because the detection is carried
out at the output end of the radio frequency power amplifier, the result of the detection
is comparatively precise, which facilitates precise control of the supply voltage
of the radio frequency power amplifier, so that the radio frequency power amplifier
works with a best efficiency point.
[0032] If the parameter detection module 21 is disposed at the input end of the radio frequency
power amplifier, the parameter detection module 21 may detect the input power of the
radio frequency power amplifier. The control module 22 may be used to adjust the output
voltage of the power supply module 23 according to the input power detected by the
parameter detection module 21. Different bias voltages are used to supply power to
the radio frequency power amplifier when the input power of the radio frequency power
amplifier is different. For example, when the input power detected by the parameter
detection module 21 is -6 dB, the output voltage of the power supply module 23 may
be 3.3 V; when the input power detected by the parameter detection module 21 is -10
dB, the output voltage of the power supply module 23 may be 3.0 V; when the input
power detected by the parameter detection module 21 is -12 dB, the output voltage
of the power supply module 23 may be 2.8 V. Because the detection is carried out at
the input end of the radio frequency power amplifier, time effectiveness is good and
the transmit power of the radio frequency power amplifier can be detected in advance,
so that the control module 22 can adjust the output voltage of the power supply module
23 more quickly to get adapted to the change of the transmit power.
[0033] If the parameter detection module 21 is disposed at the input end of the radio frequency
power amplifier, the parameter detection module 21 may detect the current of the radio
frequency power amplifier. The control module 22 may be used to adjust the output
voltage of the power supply module 23 according to the current detected by the parameter
detection module 21. Different bias voltages are used to supply power to the radio
frequency power amplifier when the input currents of the radio frequency power amplifier
are different.
[0034] In the embodiment, the parameter detection module is used to detect a system parameter
on the radio frequency transmit channel of the radio frequency power amplifier and
the control module is used to adjust the output voltage of the power supply module
according to the system parameter detected by the parameter detection module, so that
the power loss of the radio frequency power amplifier is reduced and the efficiency
of the radio frequency power amplifier is increased, thereby reducing the size and
power consumption of a communication device to save the cost of use, prolong the service
life of parts, and make a communication system less dependent on an environment.
Embodiment 6
[0035] FIG. 5 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier provided in a sixth embodiment of the present invention. As shown
in FIG. 5, compared with the previous embodiment, a control module 22 in the power
supply device for the radio frequency power amplifier in the embodiment may include
a data storage unit 221 and a control unit 222. The data storage unit 221 is configured
to store corresponding information between a system parameter and a voltage parameter;
the control unit 222 is connected to the data storage unit 221, a parameter detection
module 21, and a power supply module 23, and configured to determine, according to
the system parameter detected by the parameter detection module 21, a voltage parameter
by using the corresponding information between the system parameter and the voltage
parameter stored by the data storage unit 221.
[0036] In the embodiment, the parameter detection module is used to detect a system parameter
on the radio frequency transmit channel of the radio frequency power amplifier and
the control module is used to adjust the output voltage of the power supply module
according to the corresponding information between the system parameter and the voltage
parameter stored by the data storage unit, so that the power loss of the radio frequency
power amplifier is reduced and the efficiency of the radio frequency power amplifier
is increased, thereby reducing the size and power consumption of a communication device
to save the cost of use, prolong the service life of parts, and make a communication
system less dependent on an environment.
Embodiment 7
[0037] FIG. 6 is a schematic structural diagram of a power supply device for a radio frequency
power amplifier provided in a seventh embodiment of the present invention. As shown
in FIG. 6, compared with the previous embodiment, the power supply device for the
radio frequency power amplifier in the embodiment may further include a temperature
detection module 24 disposed in the radio frequency power amplifier, and configured
to detect system temperature. A control module 22 in the power supply device for the
radio frequency power amplifier in the embodiment may further include an adjustment
unit 223 which is connected to the temperature detection module 24 and a control unit
222 and is configured to adjust, according to the system temperature detected by the
temperature detection module 14, a voltage parameter determined by the control unit
122.
[0038] In the embodiment, the temperature detection module is used to detect the system
temperature of the radio frequency power amplifier, and the adjustment unit is used
to adjust the voltage parameter determined by the control unit. When the temperature
rises to a certain degree, power can be reduced by adjusting a supply voltage, so
as to prevent further rising of the temperature, thereby avoiding shutdown of a chip
due to very high temperature and prolonging the service life of parts.
[0039] The foregoing specific embodiments are not intended to limit the present invention.
For persons of ordinary skill in the art, any modification, equivalent replacement,
and improvement made without departing from the principle of the present invention
shall fall within the protection scope of the present invention.